“These are amazing numbers,” said attorney Steve Fox, one of the principal drafters of Colorado’s pot-legalizing Amendment 64, “especially on the tax revenue side.”

Colorado released marijuana tax data for December 2015 on Tuesday, showing a major uptick in month-over-month sales. Recreational pot sales jumped more than 21 percent from November to December, landing at $62.2 million — a monthly record in the state’s legal era. Medical sales jumped more than 32 percent in the same period, totaling $39.1 million.

“It’s remarkable that less than seven years ago, all of that money was being spent in the underground market,” said Mason Tvert, the Marijuana Policy Project’s communications director. “Clearly there’s a large demand for marijuana, and we’re now seeing that demand being met by legitimate businesses that are answering to authorities instead of criminals who answer to nobody.”

Colorado’s 2015 marijuana tax and sales totals tell a story of implementation and growth. While the state’s pot shops sold more than $699 million of cannabis in 2014, they moved more than $996 million in 2015 — a year when more pot shops opened, more municipalities started allowing these businesses and more customers found their way into the regulated market. Year-over-year totals for taxes and license fees grew too, from $76 million in 2014 to $135 million in 2015.

The school-funding 15 percent excise tax on wholesale marijuana transfers jumped from $13.3 million in 2014 to more than $35 million in 2015, according to the state.

“I’m really proud of our state and proud of our legislators and local officials, who have helped us transition away from an underground market so quickly,” said Sederberg, “so that our state can see the benefits of tax revenues, regulated sales, jobs and economic development.”

There are three types of state taxes on recreational marijuana: the standard 2.9 percent sales tax; a 10 percent special marijuana sales tax; and a 15 percent excise tax on wholesale marijuana transfers. For December, Colorado collected $11.3 million in recreational taxes and fees and almost $2 million in medical taxes and fees.

Sales stats for Colorado weed

A month-by-month look comparing sales of recreational and medical marijuana

Ricardo Baca is the founder and editor of The Cannabist, legal marijuana's paper of record and a division of The Denver Post. Fortune magazine ranked Baca as one of the seven most powerful people in American cannabis while the Brookings Institution...